Package Management

How to Configure Nginx as a Reverse Proxy for Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy for Apache2 on Debian 9

Introduction Deploying configure nginx as a reverse proxy for apache2 on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path […]

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Oracle Linux 8 — libreswan — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libreswan — vulnerability — patch and remediation guide (ELSA-2020-2070)

🟠 High   ⏱ 15–60 min  Last verified: 21 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2070 Related CVEs: CVE-2020-1763 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Install and Configure OpenLiteSpeed Web Server on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Configure OpenLiteSpeed Web Server on RHEL 8

OpenLiteSpeed is the open-source edition of LiteSpeed Web Server and delivers significantly higher PHP throughput than Apache or standard Nginx for WordPress and other PHP-heavy applications. Unlike traditional web servers, OpenLiteSpeed uses its own event-driven architecture and a tight integration with the LSPHP interpreter to handle thousands of concurrent connections with minimal RAM. On RHEL […]

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openSUSE Tumbleweed — mutt — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — mutt — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2018:2212-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-14354 CVE-2018-14360 CVE-2018-14361 CVE-2018-14351 CVE-2018-14357 CVE-2018-14363 CVE-2020-14093 CVE-2020-14154  +12 more Upstream summary: An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They […]

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Oracle Linux 8 — openssh security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openssh security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-2013)

🟡 Medium   ⏱ 10–30 min  Last verified: 20 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-2013 Related CVEs: CVE-2021-41617 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Set Up Snort IDS on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Snort IDS on Oracle Linux 8

Introduction How to Set Up Snort IDS on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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Common Problems 115448

RHEL 7 Yum Locked by Another Process During Patch Window

🟡 Medium   ⏱ 5–30 min  Last verified: 20 September 2020 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Oracle Linux 8 — freerdp security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — freerdp security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1849)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1849 Related CVEs: CVE-2020-11099 CVE-2020-11095 CVE-2020-11096 CVE-2020-11097 CVE-2020-15103 CVE-2020-4030 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Ubuntu 20.04 — mqtt-client — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — mqtt-client — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 September 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6685-1 Related CVEs: CVE-2019-0222 Upstream summary: It was discovered that mqtt-client incorrectly handled memory while parsing malformed MQTT frames. An attacker could possibly use this issue to cause a crash, […]

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How to Configure OpenSCAP Security Compliance on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure OpenSCAP Security Compliance on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the […]

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